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/*
* Copyright 2012, Google LLC
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.android.tools.smali.dexlib2.util;
import com.android.tools.smali.dexlib2.AccessFlags;
import com.android.tools.smali.dexlib2.iface.Method;
import com.android.tools.smali.dexlib2.iface.reference.MethodReference;
import com.android.tools.smali.util.CharSequenceUtils;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Collection;
import java.util.function.Predicate;
public final class MethodUtil {
private static int directMask = AccessFlags.STATIC.getValue() | AccessFlags.PRIVATE.getValue() |
AccessFlags.CONSTRUCTOR.getValue();
public static Predicate<Method> METHOD_IS_DIRECT = new Predicate<Method>() {
@Override public boolean test(@Nullable Method input) {
return input != null && isDirect(input);
}
};
public static Predicate<Method> METHOD_IS_VIRTUAL = new Predicate<Method>() {
@Override public boolean test(@Nullable Method input) {
return input != null && !isDirect(input);
}
};
public static boolean isDirect(@Nonnull Method method) {
return (method.getAccessFlags() & directMask) != 0;
}
public static boolean isStatic(@Nonnull Method method) {
return AccessFlags.STATIC.isSet(method.getAccessFlags());
}
public static boolean isConstructor(@Nonnull MethodReference methodReference) {
return methodReference.getName().equals("<init>");
}
public static boolean isPackagePrivate(@Nonnull Method method) {
return (method.getAccessFlags() & (AccessFlags.PRIVATE.getValue() |
AccessFlags.PROTECTED.getValue() |
AccessFlags.PUBLIC.getValue())) == 0;
}
public static int getParameterRegisterCount(@Nonnull Method method) {
return getParameterRegisterCount(method, MethodUtil.isStatic(method));
}
public static int getParameterRegisterCount(@Nonnull MethodReference methodRef, boolean isStatic) {
return getParameterRegisterCount(methodRef.getParameterTypes(), isStatic);
}
public static int getParameterRegisterCount(@Nonnull Collection<? extends CharSequence> parameterTypes,
boolean isStatic) {
int regCount = 0;
for (CharSequence paramType: parameterTypes) {
int firstChar = paramType.charAt(0);
if (firstChar == 'J' || firstChar == 'D') {
regCount += 2;
} else {
regCount++;
}
}
if (!isStatic) {
regCount++;
}
return regCount;
}
private static char getShortyType(CharSequence type) {
if (type.length() > 1) {
return 'L';
}
return type.charAt(0);
}
public static String getShorty(Collection<? extends CharSequence> params, String returnType) {
StringBuilder sb = new StringBuilder(params.size() + 1);
sb.append(getShortyType(returnType));
for (CharSequence typeRef: params) {
sb.append(getShortyType(typeRef));
}
return sb.toString();
}
public static boolean methodSignaturesMatch(@Nonnull MethodReference a, @Nonnull MethodReference b) {
return (a.getName().equals(b.getName()) &&
a.getReturnType().equals(b.getReturnType()) &&
CharSequenceUtils.listEquals(a.getParameterTypes(), b.getParameterTypes()));
}
private MethodUtil() {}
}
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